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Peroxide cross-linked semiconductive shielding material for 66kV cable insulation shielding PYJJ-66

This product is mainly applicable to the cross-linked adhesive type semiconductive insulation shielding of 66kV cross-linked polyethylene insulated cables, which is closely bonded with the insulation layer.

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Product details

Product model and name:

PYJJ-66 Peroxide cross-linked semiconductive shielding material for 66kV cable insulation shielding

Performance indicators (typical values)： enforce standards JB/T 10738-2007

Serial number	Test project		Unit	Indicator	PYJJ-66
1	Density		g/cm3	≤1.15	1.10
2	Tensile strength		MPa	≥15	16.5
3	Elongation at break		%	≥180	260
4	Air thermal aging	Test conditions	/	135℃×168h
		Rate of change of tensile strength	%	±25	＋8
		Rate of change in elongation at break	%	±25	－18
5	（-40℃）Impact embrittlement performance		Number of failures	≤15/30	0/30
6	Thermal extension	Test conditions	/	200℃×0.2MPa×15min
		Elongation under load	%	≤100	65
		Permanent deformation after cooling	%	≤15	0
7	Volume resistivity at 20℃		Ω.cm	≤50	30
8	Volume resistivity at 90℃		Ω.cm	≤500	320
9	Volume resistivity after air thermal aging	Test conditions	/	100℃×168h
9	Volume resistivity after air thermal aging	Volume resistivity at 90℃	Ω.cm	≤500	360
10	Moisture content		%	≤0.2	0.1

Application process reference

It is recommended that the temperature of the extruder body be between 70℃ and 100℃. Neck temperature: 100℃ to 110℃ Head temperature: 110℃ to 115℃. It is recommended to use a 20× 60-mesh double-layer filter screen.

Packaging and storage

1) The product is packed in a waterproof and dustproof PE inner bag, supplemented by a hard corrugated carton for shaping and protection, and an additional waterproof film cover. The standard net weight of each box is 500kg or 600kg.

2) It should be stored in a clean, dry and well-ventilated environment, with an appropriate storage temperature ranging from 0℃ to 35℃.

3) The stacking height should not exceed two layers, and the upper and lower layers should be neatly stacked. It is not advisable to stack them in a staggered manner.

4) The validity period is 6 months under suitable storage conditions.